/**
 * UGENE - Integrated Bioinformatics Tools.
 * Copyright (C) 2008-2020 UniPro <ugene@unipro.ru>
 * http://ugene.net
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
 * MA 02110-1301, USA.
 */

#ifndef _U2_QUERY_VIEW_CONTROLLER_H_
#define _U2_QUERY_VIEW_CONTROLLER_H_

#include <QActionGroup>
#include <QGraphicsScene>

#include <U2Gui/MainWindow.h>

#include <U2Lang/QDConstraint.h>

#include "ui_AddConstraintDialog.h"

namespace U2 {

class QueryViewController;
class QDElement;
class QueryEditor;
class QDLabelItem;
class QDDescriptionItem;
class QDRulerItem;

class QueryScene : public QGraphicsScene {
    friend class LoadSequenceTask;
    friend class QueryViewController;
    friend class QDViewAdapter;
    Q_OBJECT
public:
    QueryScene(QueryViewController *parent = 0);
    ~QueryScene();

    void initTitle();
    void initRuler();
    void initDescription();

    QDScheme *getScheme() const {
        return scheme;
    }
    QRectF rulerArea() const;
    QRectF annotationsArea() const;
    QRectF footnotesArea() const;
    QList<QDElement *> getElements() const;
    QList<QGraphicsItem *> getFootnotes() const;
    QDElement *getUnitView(QDSchemeUnit *su) const;
    void updateSceneRect();
    void setRowsNumber(int count);
    int getRowsNumber() {
        return rowsNum;
    }
    void insertRow(int idx);
    int getRow(QDElement *const uv) const;
    QDLabelItem *getLabelItem() const {
        return labelTxtItem;
    }
    QString getLabel() const;
    void setLabel(const QString &lbl);
    QString getDescription() const;
    void setDescription(const QString &dsc);
    QueryViewController *getViewController() const {
        return view;
    }
    bool showActorDesc() const {
        return showDesc;
    }
    bool showActorOrder() const {
        return showOrder;
    }

    void updateDescription();
    void addActor(QDActor *actor, const QPointF &pos);
    void addDistanceConstraint(QDElement *src, QDElement *dst, QDDistanceType distType, int min, int max);
    void removeActor(QDActor *actor);
    void removeActors(const QList<QDActor *> &actors);
    void removeConstraint(QDConstraint *c);
    void clearScene();

    bool isModified() const {
        return modified;
    }
    void setModified(bool b);
signals:
    void si_schemeChanged();
    void si_itemAdded();
public slots:
    void sl_showLabel(bool show);
    void sl_showSchemeDesc(bool show);
    void sl_showItemDesc(bool show);
    void sl_showOrder(bool show);
    void sl_adaptRowsNumber();
    void sl_updateRulerText();
    void sl_setModified() {
        setModified(true);
    }

public:
    static const QSizeF MAX_SCENE_SIZE;
    static const QSizeF DEFAULT_SCENE_SIZE;

protected:
    void mousePressEvent(QGraphicsSceneMouseEvent *mouseEvent);
    void dragEnterEvent(QGraphicsSceneDragDropEvent *event);
    void dragMoveEvent(QGraphicsSceneDragDropEvent *event);
    void dropEvent(QGraphicsSceneDragDropEvent *event);
    void drawBackground(QPainter *painter, const QRectF &rect);
    void emit_schemeChanged() {
        emit si_schemeChanged();
    }

private:
    QList<QGraphicsItem *> unitsIntersectedByRow(int idx) const;
    QList<QGraphicsItem *> getElements(const QRectF &area);
    void setupDistanceDialog(QDDistanceType kind);
    bool ajustPosForNewItem(QDElement *item, QPointF &posToAjust);

private:
    QDElement *dropCandidateLeft;
    QDElement *dropCandidateRight;
    QueryViewController *view;
    int rowsNum;
    QDScheme *scheme;

    QDLabelItem *labelTxtItem;
    QDDescriptionItem *descTxtItem;
    QDRulerItem *ruler;

    bool showSchemeLbl;
    bool showDesc;
    bool showOrder;

    bool modified;
};

class GlassView;
class QueryPalette;
class QDGroupsEditor;
class QDDocument;

class QueryViewController : public MWMDIWindow {
    Q_OBJECT
public:
    QueryViewController();
    virtual void setupMDIToolbar(QToolBar *tb);
    virtual void setupViewMenu(QMenu *m);
    void loadScene(const QString &content);
    void switchToGroupsTab();
    void setDefaultInFile(const QString &inFile) {
        inFile_ = inFile;
    }
    void setDefaultOutFile(const QString &outFile) {
        outFile_ = outFile;
    }
    QDScheme *getScheme() const {
        return scene->getScheme();
    }
    static void setupConstraintEditor(QDConstraint *c);
    void enableSaveAction(bool enable);
    QDActor *getActor() {
        return currentActor;
    }
    void setSchemeUri(QString uri) {
        schemeUri = uri;
    };

protected:
    bool onCloseEvent();
private slots:
    void sl_newScene();
    void sl_loadScene();
    void sl_saveScene();
    void sl_saveSceneAs();
    void sl_run();
    void sl_deleteItem();
    void sl_pasteSample(QDDocument *content);
    void sl_editItem();
    void sl_elementSelected(QDActorPrototype *proto);
    void sl_selectEditorCell(const QString &link);
    void sl_updateTitle();
    void sl_setGlobalStrand(QAction *a);
    void sl_itemAdded();

    void sl_scrollUp();

private:
    void createActions();
    void saveState();
    void setupViewModeMenu(QMenu *m);
    void setupQuerySequenceModeMenu(QMenu *m);
    void setupStrandMenu(QMenu *m);
    bool confirmModified();

private:
    QueryScene *scene;
    GlassView *sceneView;
    QTabWidget *tabs;
    QueryEditor *editor;
    QueryPalette *palette;
    QDGroupsEditor *groupsEditor;

    QAction *runAction;
    QAction *newAction;
    QAction *loadAction;
    QAction *saveAsAction;
    QAction *saveAction;
    QAction *deleteAction;

    QAction *showLabelAction;
    QAction *showDescAction;
    QAction *showItemDescAction;
    QAction *showOrderAction;

    QActionGroup *strandActions;
    QAction *directStrandAction;
    QAction *complementStrandAction;
    QAction *bothStrandsAction;

    QString inFile_, outFile_;
    QString schemeUri;
    QDActor *currentActor;
};

class AddConstraintDialog : public QDialog, public Ui_AddConstraintDialog {
    Q_OBJECT
public:
    AddConstraintDialog(QueryScene *scene, QDDistanceType kind, QDElement *defSrc, QDElement *defDst);
    void accept();

private:
    QueryScene *scene;
    QDDistanceType kind;
};

class QDUtils {
public:
    static QPixmap generateSnapShot(QDDocument *doc, const QRect &rect);
    static QPixmap generateSnapShot(QueryScene *scene, const QRect &rect);
};

}    // namespace U2

#endif
